Wiz Khalifa Performs 'Roll Up' on 'Letterman'

Rapper brings his hit single from 'Rolling Papers' to the 'Late Show'

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Wiz Khalifa stopped by the Late Show with David Letterman to perform "Roll Up," the hit single from his new album Rolling Papers. Wiz is typically energetic and charismatic, but this clip is worth watching if just to see Letterman's pure delight in simply uttering the name "Wiz Khalifa."